Author: glebius
Date: Mon Feb 3 20:48:57 2020
New Revision: 357466
URL: https://svnweb.freebsd.org/changeset/base/357466
Log:
Couple protocol drain routines (frag6_drain and sctp_drain) may send
packets. An unexpected behaviour for memory reclamation routine.
Anyway, we need enter the network epoch for doing that.
Modified:
head/sys/kern/kern_mbuf.c
Modified: head/sys/kern/kern_mbuf.c
==============================================================================
--- head/sys/kern/kern_mbuf.c Mon Feb 3 20:46:31 2020 (r357465)
+++ head/sys/kern/kern_mbuf.c Mon Feb 3 20:48:57 2020 (r357466)
@@ -829,15 +829,18 @@ mb_ctor_pack(void *mem, int size, void *arg, int how)
static void
mb_reclaim(uma_zone_t zone __unused, int pending __unused)
{
+ struct epoch_tracker et;
struct domain *dp;
struct protosw *pr;
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL, __func__);
+ NET_EPOCH_ENTER(et);
for (dp = domains; dp != NULL; dp = dp->dom_next)
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_drain != NULL)
(*pr->pr_drain)();
+ NET_EPOCH_EXIT(et);
}
/*
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